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Copy Angle/Parallel Line through a Point
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Copy Angle/Parallel Line through a Point

Geometry & Algebra II Archive

Geo U1: Tools of Geometry

Big Idea: Big Idea 2

Continuing in a series of construction lessons, I created a worksheet for Copying an Angle and Parallel through a point. (an application of copying an angle.)  Before this lesson, students need to understand that an angle is the measure of an arc between the two rays.  Even with this information, the lesson needs scaffolds in place to get them to understand that it is the same radius arc and the length of that arc is the same as well.  

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Type
Geometry: Tools of Geometry
File
Google Doc
Tags
copy angle
Standards
Common Core: Supporting Standards ( G-CO.A.1, G-CO.A.2, G-CO.D.12 )
+— Details
Common Core: Supporting Standards:
G-CO.A.1

Experiment with transformations in the plane. Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.

G-CO.A.2

Experiment with transformations in the plane. Represent transformations in the plane using, e.g., transparencies and geometry software; describe transformations as functions that take points in the plane as inputs and give other points as outputs. Compare transformations that preserve distance and angle to those that do not (e.g., translation versus horizontal stretch).

G-CO.D.12

Make geometric constructions. Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.). Copying a segment; copying an angle; bisecting a segment; bisecting an angle; constructing perpendicular lines, including the perpendicular bisector of a line segment; and constructing a line parallel to a given line through a point not on the line. Clarification: Constructions include but are not limited to the listed constructions. Example: constructing the median of a triangle or constructing an isosceles triangle with given lengths.

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